Question: We've been asked to provide a floor with a tolerance of 0.02 inch in 10 feet. Has anyone built a floor to this tolerance? Is it possible?

Answer: A tolerance of 0.02 inch in 10 feet is extremely difficult. This tolerance would definitely classify the floor construction as superflat and be equivalent to a floor flatness (FF) of more than 200. We don't know of any contractor that has constructed a floor to this tolerance, nor do we think it's reasonable to attempt to meet this tolerance, much less accurately measure it. Maybe the tolerance has an extra zero that doesn't belong. The tolerance makes more sense if it's 0.20 inch in 10 feet.